[RFC PATCH 2/2] vvmx: Reinject TDX instruction exit reasons to L1 when emitted by L2

[Teddy Astie <teddy.astie@xxxxxxxxxx>]

Reinject the exit reason to L1 rather than failing on "Unhandled nested vmexit"
which leads to a L1 crash that can be caused by L2 by executing one of the TDX
instructions.

Signed-off-by: Teddy Astie <teddy.astie@xxxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vvmx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xen/arch/x86/hvm/vmx/vvmx.c b/xen/arch/x86/hvm/vmx/vvmx.c
index e4cdfe55c1..b2ad7db332 100644
--- a/xen/arch/x86/hvm/vmx/vvmx.c
+++ b/xen/arch/x86/hvm/vmx/vvmx.c
@@ -2496,6 +2496,8 @@ int nvmx_n2_vmexit_handler(struct cpu_user_regs *regs,
     case EXIT_REASON_INVEPT:
     case EXIT_REASON_XSETBV:
     case EXIT_REASON_INVVPID:
+    case EXIT_REASON_SEAMCALL:
+    case EXIT_REASON_TDCALL:
         /* inject to L1 */
         nvcpu->nv_vmexit_pending = 1;
         break;
-- 
2.54.0



--
Teddy Astie | Vates XCP-ng Developer

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